112-pp6 - UNIVERSITY OF SOUTH ALABAMA Quiz Two (10:10-10:15...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Quiz Two (10:10-10:15 AM) GY 112: Earth History Lecture 6: Clever Thinking 3: Stratigraphy UNIVERSITY OF SOUTH ALABAMA Last time we covered… Alfred Wegener and “Drifting Continents” The Plate Tectonic Revolution Plate Tectonics Mechanisms Wegener’s hypothesis: 300 million years ago, the continents were all grouped together into a “supercontinent” he called Pangaea Radar, sonar, and depth sounding revealed that the ocean bottoms were not flat planes The Plate Tectonics Revolution Earth has a magnetic field (and it isn’t constant) The Plate Tectonics Revolution
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1963-1968 J. Tuzo Wilson was the first to describe global tectonics in terms of rigid surface "plates“, and recognized ocean evolution (“Wilson Cycle”). He characterized three basic plates boundaries The Plate Tectonics Revolution The Plate Tectonics Mechanism Crust Mantle Geophysical layers Tectonic layers Lithosphere: Athenosphere: Collectively, the rigid outer most part of the Earth (about 100 km thick) is called the Lithosphere The Plate Tectonics Mechanism Asthenosphere Hence the term “plate tectonics” Today’s Agenda 1. Plate Tectonic Mechanisms (last lecture) 2. William Smith and Water 3. Stratigraphic Principles 4. Geological Time Lecture 6: Stratigraphy and Geological Time (Web Lecture 6) Clever thinkers:
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/04/2012 for the course GLY 112 taught by Professor Haywick during the Spring '12 term at S. Alabama.

Page1 / 6

112-pp6 - UNIVERSITY OF SOUTH ALABAMA Quiz Two (10:10-10:15...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online